Qubit question
-
Can anyone explain how this 'qubit control' can be used for information storage? It looks like all they are doing is setting all of them to a certain state at once, which doesn't seem that useful. Like putting all 'on' in memory. [“Missing Puzzle Piece” Discovered: Critical Advance in Quantum Computer Design](https://scitechdaily.com/missing-puzzle-piece-discovered-critical-advance-in-quantum-computer-design/)
The Science of King David's Court | Object Oriented Programming with C++
-
Can anyone explain how this 'qubit control' can be used for information storage? It looks like all they are doing is setting all of them to a certain state at once, which doesn't seem that useful. Like putting all 'on' in memory. [“Missing Puzzle Piece” Discovered: Critical Advance in Quantum Computer Design](https://scitechdaily.com/missing-puzzle-piece-discovered-critical-advance-in-quantum-computer-design/)
The Science of King David's Court | Object Oriented Programming with C++
Dunno, I would remove the batteries before storing them though.
-
Can anyone explain how this 'qubit control' can be used for information storage? It looks like all they are doing is setting all of them to a certain state at once, which doesn't seem that useful. Like putting all 'on' in memory. [“Missing Puzzle Piece” Discovered: Critical Advance in Quantum Computer Design](https://scitechdaily.com/missing-puzzle-piece-discovered-critical-advance-in-quantum-computer-design/)
The Science of King David's Court | Object Oriented Programming with C++
I saw that or a similar article on the same subject and it seems to me they author really has no idea. At one point describing how a qubit can have multiple states then describing how they use a wire to determine the "spin" of the qubit setting either 1 or 0. I want to know how they can get a qubit to "spin" in both directions
Never underestimate the power of human stupidity - RAH I'm old. I know stuff - JSOP
-
Can anyone explain how this 'qubit control' can be used for information storage? It looks like all they are doing is setting all of them to a certain state at once, which doesn't seem that useful. Like putting all 'on' in memory. [“Missing Puzzle Piece” Discovered: Critical Advance in Quantum Computer Design](https://scitechdaily.com/missing-puzzle-piece-discovered-critical-advance-in-quantum-computer-design/)
The Science of King David's Court | Object Oriented Programming with C++
The paper[^] doesn't make any claims about information storage. It sounds like you are getting speculation from a journalist. Don't believe everything you read online, journalists want more views sometimes at the expense of accuracy. Let's extract the claim (last paragraph on page 2):
Here we demonstrate ESR of single spins in a silicon metal-oxide-semiconductor (SiMOS) quantum dot (QD) device by using a compact dielectric resonator (DR) placed above the chip (Fig. 1B). The DR is constructed from potassium tantalate (KTaO3 or KTO), a quantum paraelectric material that exhibits an exceptionally high dielectric constant at cryogenic temperatures and hence compact microwave mode volumes. ESR control is confirmed to be resonator-driven by observing an enhancement in the mixing of the quantum dot spin states within the dielectric resonator bandwidth. This represents the first step towards the vision of large-scale qubit control using global magnetic fields generated off-chip.
Then look at the methodology/results, I am not going to paste it here because it's too long, but all you need to do is read the section labled 'Nanoelectronic Device and Spin Readout' on page 4. Note that in the final paragraph the authors state that they have only achieved "81% fidelity". Which is an middle/high error rate. That's really all you need to look at. There is no claim about information storage. Best Wishes, -David Delaune
-
I saw that or a similar article on the same subject and it seems to me they author really has no idea. At one point describing how a qubit can have multiple states then describing how they use a wire to determine the "spin" of the qubit setting either 1 or 0. I want to know how they can get a qubit to "spin" in both directions
Never underestimate the power of human stupidity - RAH I'm old. I know stuff - JSOP
-
The paper[^] doesn't make any claims about information storage. It sounds like you are getting speculation from a journalist. Don't believe everything you read online, journalists want more views sometimes at the expense of accuracy. Let's extract the claim (last paragraph on page 2):
Here we demonstrate ESR of single spins in a silicon metal-oxide-semiconductor (SiMOS) quantum dot (QD) device by using a compact dielectric resonator (DR) placed above the chip (Fig. 1B). The DR is constructed from potassium tantalate (KTaO3 or KTO), a quantum paraelectric material that exhibits an exceptionally high dielectric constant at cryogenic temperatures and hence compact microwave mode volumes. ESR control is confirmed to be resonator-driven by observing an enhancement in the mixing of the quantum dot spin states within the dielectric resonator bandwidth. This represents the first step towards the vision of large-scale qubit control using global magnetic fields generated off-chip.
Then look at the methodology/results, I am not going to paste it here because it's too long, but all you need to do is read the section labled 'Nanoelectronic Device and Spin Readout' on page 4. Note that in the final paragraph the authors state that they have only achieved "81% fidelity". Which is an middle/high error rate. That's really all you need to look at. There is no claim about information storage. Best Wishes, -David Delaune
Thanks. It sounds like it isn't just the journalist, though, because if you watch the [“Missing Puzzle Piece”: Critical Advance in Quantum Computer Design](https://www.youtube.com/watch?v=vMQ6EJREvCg) video on that page, Andrew Dzurak makes it sound as if this will be the breakthrough that leads to heaven. But as you said, the error rate is still significant. Also, all this is doing is making a resonant field of quantum cubits, as far as I can see it. (If such terminology is valid for quantum particles.) That is effectively one qubit? (+/- 19% :rolleyes: ) Maybe he has had to write too many grant requests throughout the years, and is caught up in the heat of salesmanship?
The Science of King David's Court | Object Oriented Programming with C++
-
Thanks. It sounds like it isn't just the journalist, though, because if you watch the [“Missing Puzzle Piece”: Critical Advance in Quantum Computer Design](https://www.youtube.com/watch?v=vMQ6EJREvCg) video on that page, Andrew Dzurak makes it sound as if this will be the breakthrough that leads to heaven. But as you said, the error rate is still significant. Also, all this is doing is making a resonant field of quantum cubits, as far as I can see it. (If such terminology is valid for quantum particles.) That is effectively one qubit? (+/- 19% :rolleyes: ) Maybe he has had to write too many grant requests throughout the years, and is caught up in the heat of salesmanship?
The Science of King David's Court | Object Oriented Programming with C++
Yeah, It's speculation. I'm not an expert in quantum computing but from what I can understand the technique they are using looks very very promising. I do understand the most of the physics and the core idea that makes all it it work is explained in the section labled 'Nanoelectronic Device and Spin Readout'. It's actually pretty simple, once they reach a triplet state[^] the Pauli exclusion principle[^] prevents the electron from tunneling and it maintains it's state. This is the core idea behind their technique. One of the biggest hurdles for me when I read these papers is that every science field has it's own nomenclature. For some reason the paper refers to the Pauli exclusion principle as 'Pauli spin blockade' abbreviated as PSB. It looks like this term is exclusive to the quantum computing field.
-
Can anyone explain how this 'qubit control' can be used for information storage? It looks like all they are doing is setting all of them to a certain state at once, which doesn't seem that useful. Like putting all 'on' in memory. [“Missing Puzzle Piece” Discovered: Critical Advance in Quantum Computer Design](https://scitechdaily.com/missing-puzzle-piece-discovered-critical-advance-in-quantum-computer-design/)
The Science of King David's Court | Object Oriented Programming with C++
It is the same technique as putting all the toppings on the pizza before putting into oven, But, this technique facilitates the removal of half-alive cats, an optimization that saves toppings like anchovies.
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
-
It is the same technique as putting all the toppings on the pizza before putting into oven, But, this technique facilitates the removal of half-alive cats, an optimization that saves toppings like anchovies.
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
-
It is the smoke from the half-dead cats that gives the pizza the special taste that people wait in line for eternity ... for.
«The mind is not a vessel to be filled but a fire to be kindled» Plutarch
-
The paper[^] doesn't make any claims about information storage. It sounds like you are getting speculation from a journalist. Don't believe everything you read online, journalists want more views sometimes at the expense of accuracy. Let's extract the claim (last paragraph on page 2):
Here we demonstrate ESR of single spins in a silicon metal-oxide-semiconductor (SiMOS) quantum dot (QD) device by using a compact dielectric resonator (DR) placed above the chip (Fig. 1B). The DR is constructed from potassium tantalate (KTaO3 or KTO), a quantum paraelectric material that exhibits an exceptionally high dielectric constant at cryogenic temperatures and hence compact microwave mode volumes. ESR control is confirmed to be resonator-driven by observing an enhancement in the mixing of the quantum dot spin states within the dielectric resonator bandwidth. This represents the first step towards the vision of large-scale qubit control using global magnetic fields generated off-chip.
Then look at the methodology/results, I am not going to paste it here because it's too long, but all you need to do is read the section labled 'Nanoelectronic Device and Spin Readout' on page 4. Note that in the final paragraph the authors state that they have only achieved "81% fidelity". Which is an middle/high error rate. That's really all you need to look at. There is no claim about information storage. Best Wishes, -David Delaune